Surgical patch



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Patented Nov. 7, 15922.

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ALBERT F. HENDERSON, OF MDDLETON, MASSACHUSETTS.

SURGICAL PATCH.

Application led May 25, 1921. Serial No. 472,409.

To all 'whom t may concern.'

Beit known that-I, ALBERT F. HENDERSON, a citizen of the United States,residing at Middleton, in the county or' Essex and State ofMassachusetts, have invented neW and useful Improvements in lSurgicalPatches, of which the following is a specification.

This invention has for its object to provide a surgical patch ofimproved construction, adapted to be conveniently and securely appliedto an area to be protected, and to present to a wounded or diseasedportion of said area, a facing of absorbent compressible Ventilatingmaterial, such as absorbent cotton, to permit ventilation of the saidportion.

The invention is embodied in the improvements which l will now proceedto describe and claim.

Of the accompanying drawings forming a part of this' specicatiom- Figure1 is a plan view showing an elongated patch strip embodying theinvention,

'adapted to be cut into a plurality of operative patches, and providedwith a detachable and discarda'ble covering layer.

Figure 2 is an enlarged section on line 2-'2 of Figure 1.

Figure 3 is an enlarged plan View of a patch cut from the strip shown byFigure 1, the covering layer being removed.

Figure 4f is a section on line 4 4 of Figure 3.

Fi ure 5 is a view similar to Figure fi,

showing -the patch applied 'to an area to be protected.

Figure 6 is a view similar to Fi ure 3, showing a single patch providedwit a detachable and discardable covering layer.

Figure 7 is a plan view of an elongated patch strip, and illustrating aditlerent arrangement ol the absorbent material.

The same reference `characters indicate the same parts in all of thefigures.

`12 represents a conning layer of any suitable flexible sheet material,such as cotton cloth, having on its inner side an adliesive coating 13,indicated by the heavy black line in Fi ures 2, 4f, and 5 and by thetransversely sha ed portions in the other ligures.

The said coating is of a non-drying nature, so `that it remains for aprotracted period in a viscous or sticky condition, a suitable materialfor thev coating being Z. O.

a backing portion.

-tected area.

plaster, an adhesive, composition containing zinc oxide.

The layer 12 includes a central portion provlded with apertures 14, andimperiorate portions projecting in opposite directions from theapertured central portion. 16 represents an absorbent layer ofcompressible material, which is pervious to air.v such as the well knownabsorbent cotton. sorbent layer is of smaller area than the conimnglayer, and is united by the coating 13 to the apertured central portionof the conlining layer. Said central portion, therefore, backs theabsorbent layer, and is called-A The imperforate )ortions oi' theconfining layer project rom opposite edges of the absorbent layer andconstitute flaps having adhesive inner surfaces, which are exposed, sothat they may be caused to adhere to human skin. As shown by Figure 5,the patch may be secured by the exposed portions of the coating 13 to anarea 17, to be protected by the patch,a Wound or an infected spot insaid 'area being protected and ventilated by the absorbent layer 16, andby the apertures in the central portion of the confining layer.

The inner side of the patch is formed partly by the absorbent layer 16,and partly by the inner sides of the projecting portions or flaps of theconfining layer 12, so that the inner side of the patch has a centralabsorbent Ventilating section adapted to contact directly with'an areato be protected, and adhesive flaps or sections at opposite edges of theabsorbent section adapted to adhere to skin surfaces at opposite sidesof the `ro- The outer side of the patc 1 is formed entirely by theconfining layer 12, the apertures 14 of which expose portions ,of theabsorbent` material to the air, so that the protected area iscontinuously ventilated.

When the patch is prepared for the market and keptfin stock, it ispreferably provided with a covering layer 18, of thin muslin, detachablysecured to the patch by the exposed portions of the coating 13. When thepatch is to be used, the covering layer is pulled off and discarded.

ll prefer in'practicing my invention, to manufacture an elongatedsurgical patch strip, as shown by Figure 1, said strip being adapted tobe transversely cut as aty the dotted line a--m (Figure 1) .f to form aplurality of independent patches. In said patch strip Said abthe severalla ers are elon ated, and the perforations int e confining ayer arearranged to form a perforated longitudinal zone.

The strip including the elongated covering layer 18 may be rolled,folded, or other wise prepared for the market.

. strip, I app In the embodiment of the invention shown by Figures l, 3and 6the compressible absorbent layer extends continuously Vbetween twoopposite edges ot the patch, so that the y of its edge portions.

In makin up a divisible elongated'patch tions 16` t e elongate apluraliy of absorbent secconfining layer 12,

the orifices 14 being arranged in groups, each group communicating witha Jfacing section.

I claim:

A surgical patch composed of an outer layer of flexible sheet-likematerial provided with a series of perforations, and a layer ofabsorbent material, of less 'area than the outer layer, arranged acrossthe inner face ot the perforated section of the outer layer and forminga portion of the inner side of the patch, portions of the inner surfaceof the outer layer beyond the margin of the abl sorbent layer beingcoated with an adhesive whereby the patch may be secured in operativeposition with the entire inner surface of the absorbent layer in Contactwith an area to be protected, the absorbent layer being -pervious to airand the perforations in the.

outer layer exposing ent layer to the air.

In testimony whereof I have afiixed my signature.

portions of said absorb- ALBERT F. HENDERSON.

